Hijira Slavic zuwa Balkans ya fara ne a tsakiyar karni na 6 da farkon shekarun farko na karni na 7 a farkon tsakiyar zamanai.Saurin yaɗuwar alƙaluman jama'a na Slavs ya biyo bayan musayar yawan jama'a, gaurayawan harshe da jujjuyawar harshe zuwa kuma daga Slavic.An sami sauƙaƙa sulhu ta hanyar raguwar yawan al'ummar Balkan a lokacin Annobar Justinian.Wani dalili kuma shine Late Antique Little Ice Age daga 536 zuwa kusan 660 CE da kuma jerin yaƙe-yaƙe tsakanin Daular Sasaniya da Avar Khaganate a kan Daular Roma ta Gabas .Kashin baya na Avar Khaganate ya ƙunshi kabilun Slavic.Bayan gazawar da aka yi wa Konstantinoful a lokacin rani na 626, sun kasance a cikin yankin Balkan mai faɗi bayan sun zaunar da lardunan Byzantine a kudu da kogin Sava da Danube, daga Adriatic zuwa Aegean har zuwa Bahar Maliya.Gajiye da dalilai da yawa kuma ya ragu zuwa yankunan bakin teku na Balkans, Byzantium bai iya yin yaki a bangarori biyu ba kuma ya dawo da yankunan da ya ɓace, don haka ya yi sulhu tare da kafa tasirin Sklavinias kuma ya haifar da ƙawance tare da su a kan Avar da Bulgar. Khaganates.